Pile point



NOV. 6, 1934. w L. BALD ET AL 1,979,599

FILE POINT Original Filed Sept. 30, 1955 Jvm 92. 5222 ATTORNEY PatentedNov. 6, 1934 FILE norm Warrn..L .,B,altl BfiWE y Hills, Calif and Elwood1 s nealryne, LaureLMd.

mlicatimsentemhe 30.1933. Serial Na. 691,586

- RenewedrSeptember 18, 1934 6 Claims. 01. 61-78) This invention-relatesto pile points adapted to be detachably applied to the penetrating endof a tubular pile casing anddri'ven into the earth in the usual manner.

More particularly, the invention comprehends a pile point havingdetachable connections-to the casing and provided with disengaging meansadapted to recover thepoint after the casing has been driven to thedesired depth.

For further comprehension of the invention, and of the objects andadvantages thereof, reference is hadto the following descriptionandaccompanying drawing, and to-theappended claims in which the variousfeatures-of the inventionare 1-5 more particularly pointedout,

Fig; I is an elevational view showing a pile casing provided at itslower end with a detachable pile point constructed in accordancewith thepresent invention. a

Fig. 2 is an enlarged sectional elevational view showingan assemblyofthe pile point and outer casing.

Fig. 3 is a plan view ot the pilepoint looking at the top thereof;

Fig. 4 is a detail top'vi'ew 01a drivinglugshown in connection withadjacent parts of the pile point.

In the drawing in whichrthe several reference characters representcorresponding parts throughout the several views, numeral 5 indicates atubular pile casing having atits upper end a driving head 6 adapted toreceive the usual hammer blows for downwardly forcing the casing intothe earth, the force being transmitted to the bottom edge of the casingwhich engages the projecting ends of the driving lugs 7 mounted in thepile point indicated generally by 8.

The pile point comprises an upper tubular section or body part 9 formedwith a conical, lower penetrating portion 10, the upper section beingprovided with transverse slots or passages 11 shaped to receive thedriving lugs '7, the latter being provided with upwardly extending innerledges 12 that engage the interior face of the tubular body part abovethe slots 11 and serve as stops to limit the outward projection of thelugs, the bottom face 13 of the latter being inclined inwardly anddownwardly and arranged to bear against a correspondingly shaped seatformed on the bottom wall of the slots and adapted to receive thedriving force exerted upon the pile casing. For securing the drivinglugs '7 in projected position, a locking sleeve 14 is slidably mountedfor lengthwise movement within the tubular portion 9 of the pile point,the sleeve being reduced at its lower end to form a shoulder that isadapted to bear upon the ledges 12 of the driving lugs 7, the reducedportion of the sleeve also serving to engage the inner faces of thedriving lugs and thus lock the latter in projected position.

Atits'upper end the locking sleeve 14 is provided with a bridge-15,having a flexible connection 16 leading to the pile point and connectingthe same to the sleeve, the bridge being also provided with a flexiblehoist connection 17 leading upwardly through'the pile casing 5 and thehead 6 to a suit.- able hoisting device, not shown, and'whereby theseveral partscomprising the pile point may be drawn upwardly through thepile casing and re..- moved therefrom after-the same has been. driven tothe desired depth.

In the operation of removingthe pilepoint, the tension of the hoistconnection 17 serves to raise the locking sleeve 14 within the pilepoint and release the driving lugs 7, allowing the latter to fallinwardly by'gravity within the conical section ofthe pile point and tobe carried upwardly there.-

.With by means of the flexible connection 16'.

In assembling the several parts of the pile point, the jointly connectedlocking sleeve 14 is positioned-at the side of the pile point body asshown in dotted lines in Fig. 2, and. the driving lugs 7 are insertedintheir respective slots from the in,- side of the point, the outward orprojecting position of the lugs being limited by the upper ledges l2 andthe inclined bottom faces 13 formed thereon, the inclination of thefaces being disposed to cause the lugs when released to fall by gravitywithin the pile point as above described. To temporarily prevent thelugs from falling inwardly during assembly, the projecting portionsthereof are provided with perforations 18 adapted to receive removablepins 19, and as thus held the flexible connection 16 is then foldedwithin the locking sleeve 14 and the latter inserted within the bodypart 9 and disposed in engagement with the inner faces of the drivinglugs to lock the same in projected position, after which the temporarypins 19 are removed from the prfi'jecting portions of the lugs, and thelatter are then adapted to be engaged by the lower end of the pipecasing 5. As thus assembled the pile point is free to be connected tothe flexible hoist connection and inserted into the lower end of thepipe casing and the latter disposed in well known manner in driv- Iiiing position. Also, for the disengagement of the pile point underadverse ground conditions, the complete delivery of the driving lugs 7into the chamber of the point may be positively effected by the addedforce of one or more hammer blows slots formed in the walls of said bodypart and projecting therefrom, the projecting portions of said lugsbeing provided with perforations, and

the lugs being provided with means coacting with said body part to limitthe movement of the lugs in said slots, stop pins temporarily disposedwithin said perforations and adapted to hold said lugs in projectedposition, and a locking sleeve slidable lengthwise within said body partand adapted to engage the inner faces of said driving lugs and lock thelatter in projected position, whereby the stop pins may be removed, saidsleeve having connection with the pile point whereby the retraction ofthe sleeve will withdraw the point subsequent to movement of the drivinglugs from projected position. I

2. In a hollow pile point, transverse passages extending through thewalls thereof, the lower faces of said passages being inclineddownwardly and inwardly, driving lugs extending through said passagesand projecting outwardly of said point, means on said lugs engaging theinner wall of the pile point for limiting the outward projection of saidlugs, and retractible means within the pile point for holding thedriving lugs against movement inwardly and downwardly on the faces ofsaid passages, and means connectedto thepile point and operable to causeretractive movement thereof upon operatiton of said retractible means torelease the driving lugs for inward movement. 3. In a pile point havinga tubular upper sec-7 .tion and a conical lower section terminating in ahollow'piercing end, and transverse passages extending through the Wallsof said upper section, the lower faces of said passages being inclinedinwardly and downwardly, driving lugs extending through said' passagesand having bearing faces slidably engaging the side walls of saidpassages, a sleeve within the pile point and engaging the lugs andlocking the latter in projected position, and means for disengaging saidsleeve and allowing said lugs to slide over the inclined lower faces ofsaid passages and enter under gravity into the hollow lower section ofsaid pile point, the sleeve having connection with the point forwithdrawal of the latter.

4. In a pile point having hollow upper and lower sections, driving lugstransversely slidable in passages formed through the walls of said uppersection and adapted to project outwardly therefrom, the passages havinginclined walls adapted to guide the driving lugs downwardly and inwardlyrelatively to the pile point, retractible locking means disposed in thesaid upper secpluralityofdriving lugseach adapted to enter one of saidslots, each lug being formed with an inclined face adapted to bearagainst a wall of the point, whereby pressure imposed upon the top ofthe lugtends to move it inwardly and downwardly, and retractible meanswithin the pile point for resisting said movement of the lug, and aconnection between said retractible means and the pile point forwithdrawing the latter upon retraction of said means. I

6. A hollow pile point formed with a plurality of slots throughitsvwall, in combination with a plurality of; driving lugs each adaptedto enter one of said slots, each lug being formed with an inclined faceadapted to bear against a Wall of -the'p0int and formed with an upwardlyextending ledge also adapted to bear, against the inner wall of thepoint, and retractible means within the point-for-temporarily holdingthe lug within the slot, and a connection between said retractiblemeansand the-point for withdrawal of the pile point.-' 1 I r WARREN L.BALD. ELWOOD S. DEAKYNE.

, tion and adapted to hold said lugs in projected position, theretraction thereof relasing said lugs

